Overall
- Rapid City
- 89.2
- Walla Walla
- 98.5
Diff +9.4 RPP
Rapid City vs Walla Walla
Cost of living comparison based on BEA Regional Price Parities. Walla Walla is 10.5% more expensive than Rapid City.
10.5% more expensive
Walla Walla, WA is 10.5% more expensive than Rapid City, SD on BEA Regional Price Parities (overall RPP 98.5 vs 89.2). A $100,000 salary in Rapid City buys about the same as $110,497 in Walla Walla; the largest component gap is services.
- Overall RPP 89.2 (Rapid City) vs 98.5 (Walla Walla)
- $100k in Rapid City ≈ $110,497 purchasing power in Walla Walla
- Services drives the gap (+15.2 RPP points)
RPP parity plate
Pair SD:WA 89.2→98.5
TIER-GAP · CROSS-STATE · SERVICES-LED · BOTH-BELOW · PP-SHIFT
- TIER-GAP Clear tier gap
- CROSS-STATE SD × WA
- SERVICES-LED Services-led gap
- BOTH-BELOW Both below 100
- PP-SHIFT PP shift
Instrument codes from this pair's BEA Regional Price Parities (overall · goods · services · rents · national benchmark 100 · purchasing-power conversion), not a ranking or recommendation.
What This Comparison Actually Tells You
Both metros remain below the U.S. benchmark of 100. This comparison chooses between two below-average price levels; “more expensive” here does not mean nationally expensive.
Rapid City, SD and Walla Walla, WA sit in clearly different price tiers, separated by 9.4 RPP points. At this distance, treating the same nominal salary as equivalent would materially change purchasing power.
Services leads the difference, with Walla Walla 15.2 points higher than Rapid City. Goods, services, and rents all point in the same broad direction, making the headline comparison more transferable across household types.
Comparable population context is incomplete for this pair, so no market-scale explanation is inferred from the price indexes.
For a service-heavy household, test childcare, health, and other locally supplied costs before relying on rent alone. The BEA ratio converts $100,000 in Rapid City to $110,497 in Walla Walla, but it is not a personal spending weight.
Category Breakdown
Goods
- Rapid City
- 95.5
- Walla Walla
- 105.0
Diff +9.6 RPP
Services
- Rapid City
- 79.1
- Walla Walla
- 94.3
Diff +15.2 RPP
Rents
- Rapid City
- 72.6
- Walla Walla
- 86.6
Diff +14.0 RPP
| Category | Rapid City | Walla Walla | Difference |
|---|---|---|---|
| Overall | 89.2 | 98.5 | +9.4 |
| Goods | 95.5 | 105.0 | +9.6 |
| Services | 79.1 | 94.3 | +15.2 |
| Rents | 72.6 | 86.6 | +14.0 |
Visual Comparison
Overall
Rapid City 89.2
Walla Walla 98.5
Goods
Rapid City 95.5
Walla Walla 105.0
Services
Rapid City 79.1
Walla Walla 94.3
Rents
Rapid City 72.6
Walla Walla 86.6
Vertical line = national average (100)
Salary Equivalents
What a salary in Rapid City would need to be in Walla Walla for the same purchasing power:
| In Rapid City | In Walla Walla | Difference |
|---|---|---|
| $50,000 | $55,248 | +$5,248 |
| $75,000 | $82,873 | +$7,873 |
| $100,000 | $110,497 | +$10,497 |
| $150,000 | $165,745 | +$15,745 |
$ in Rapid City = in Walla Walla
Same BEA Regional Price Parity ratio as the table above (89.2 → 98.5), computed live from your number, nothing is sent anywhere.
Rapid City
89.2
Cost Index
Walla Walla
98.5
Cost Index
Frequently Asked Questions
Is Walla Walla more expensive than Rapid City?
Walla Walla is 10.5% more expensive than Rapid City. The overall cost index is 98.5 vs 89.2 (national average = 100).
What salary in Walla Walla equals $100K in Rapid City?
A $100,000 salary in Rapid City has the same purchasing power as $110,497 in Walla Walla. This is based on the BEA Regional Price Parity indexes.
How do rents compare between Rapid City and Walla Walla?
Rents in Rapid City are indexed at 72.6 while Walla Walla is at 86.6 (national average = 100). Walla Walla has higher rents.
Data sources
- BEA Regional Price Parities (RPP), the cost-of-living indices shown on this page
- U.S. Census Bureau, American Community Survey (ACS), gross-rent observations behind the rents component
- BLS Consumer Price Index (CPI), goods and services price relatives
- BLS Occupational Employment and Wage Statistics (OEWS), labor-driven services component
- HUD Fair Market Rents (FMR), 40th-percentile rent cross-reference
Every figure on PlainCost is rendered directly from BEA Regional Price Parity source data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, our changelog, or report a data error. Data current as of 2026-08-11. Rankings measure the published cost-of-living index only; we don't recommend where to live or rate any metro's quality of life.